On March the third 1974 Turkish Airlines Flight 981 crashes in Paris, all 364 passenger are killed instantly.

The crash resulted from the failure of the rear cargo hatch latching system, which allowed the hatch to blow off in flight. The resulting decompression of the cargo hold caused the cabin floor above the hatch to collapse. The flight control cables for the airplane that ran through the floor were severed, leaving the pilots with almost no control over the aircraft.
Problems with the latching system and the potential failure mode that led to the crash were known to Convair, the fuselage's builder, several years prior to the accident. Changes that addressed the problem had been found, but were not applied to TC-JAV, nor many other aircraft in the DC-10-10 fleet.